BQ8211

BQ8211 Low Dropout 300mA Voltage Regulator with Enable Product Specification Revision 1.3 September 13, 2006 General Description The BQ8211 is a low dropout voltage regulator capable of delivering 300 mA to the load. It is adjustable and can set a precise voltage from 1.175V to 15V with two external resistors. The BQ8211 meets all specifications down to 1.175V output, unlike CMOS LDO’s which loose performance with outputs below 2.25V. The enable pin provides a remote turn-off for low power consumption. It draws virtually zero current while in shutdown mode. To assure accuracy within 2% over temperature, the heart of the BQ8211 is a self-correcting AcuRef™ bandgap reference. On-chip current limit and thermal shutdown with hysteresis protects against any combination of overload and ambient temperature that might cause the junction temperature to exceed safe limits. Applications • Graphic cards and PC motherboards • Cell Phones • DVD video player Replacement for: • LX8211 Features • Low dropout voltage (980mV at 300 mA) • Enable pin implements sequencing • Vout tolerance less than 2 % over • • • • • • temperature Featured in the very small SOT-23 package Stable with low cost 1µF capacitor Low ground current Thermal protection with hysteresis Short circuit protection RoHS compliant available Typical Application www.acutechnology.com BQ8211 Acutechnology Semiconductor Inc. BQ8211 Pin Configuration Pin Descriptions Pin Name VIN Ground ENABLE Adjust VOUT Function + Unregulated Input Voltage, Collector of Pass Transistor - Ground Active high, ENABLE > 1 V OFF low, ENABLE < 0.25V Adjust input. Connect to resistive feed back divider. Regulated Output Functional Block Diagram www.acutechnology.com 2 Rev. 1.3 September 13, 2006 Acutechnology Semiconductor Inc. BQ8211 Ordering Information Device BQ8211 BQ8211 BQ8211 BQ8211 BQ8211 BQ8211 BQ8211 BQ8211 Note: The Operating Tj 0C˚ ≤ 125C˚ 0C˚ ≤ 125C˚ 0C˚ ≤ 125C˚ 0C˚ ≤ 125C˚ 0C˚ ≤ 125C˚ 0C˚ ≤ 125C˚ 0C˚ ≤ 125C˚ 0C˚ ≤ 125C˚ %Tol 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 PKG Type SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 VOUT 1.8V 1.8V 2.5V 2.5V 3.3V 3.3V ADJ ADJ Wrap T&R T&R T&R T&R T&R T&R T&R T&R Ordering Number BQ8211CY-M5-18-TR BQ8211CY-M5-18-TRL BQ8211CY-M5-25-TR BQ8211CY-M5-25-TRL BQ8211CY-M5-33-TR BQ8211CY-M5-33-TRL BQ8211CY-M5-AJ-TR BQ8211CY-M5-AJ-TRL TRL parts are Lead Free and RoHS compliant. Absolute Maximum Ratings Stress greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These stress ratings only, and functional operation of the device at these or any conditions beyond those indicated under recommended Operating Conditions is not implied. Exposure to “Absolute Maximum Rating” for extended periods may affect device reliability. Use of standard ESD handling precautions is required. Parameter Maximum VIN Maximum VENABLE Power Dissipation (Internally limited) Maximum Junction Temperature Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 4 sec.) SOT- 23-5 package 150 -40 to 125 -65 to 150 300 °C °C °C °C Value 18 Vin + 0.3V Units Volts Volts Thermal Management Thermal Resistance (Junction to Ambient) SOT-23-5 (minimum foot print) Typical Value 220 Typical Value 170 Units °C/W Units °C/W Thermal Resistance (Junction to Ambient) SOT-23-5 (Soldered to 1 in2 1 oz. copper PCB) www.acutechnology.com 3 Rev. 1.3 September 13, 2006 Acutechnology Semiconductor Inc. BQ8211 Electrical Specifications Electrical characteristics are guaranteed over the full temperature range 40ºC